AUDIO AND VISUAL SYSTEM Steering Pad Switch Circuit

DESCRIPTION

This circuit sends an operation signal from the steering pad switch to the radio receiver.

If there is an open in the circuit, the audio system cannot be operated using the steering pad switch.

If there is a short in the circuit, the same condition as when a switch is continuously depressed occurs.

Therefore, the radio receiver cannot be operated using the steering pad switch, and also the radio receiver itself cannot function.

WIRING DIAGRAM

A017C0JE24

INSPECTION PROCEDURE

Note

The vehicle is equipped with a Supplemental Restraint System (SRS) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the precautionary notice for the supplemental restraint system Click here.

PROCEDURE


  1. INSPECT RADIO RECEIVER


    1. A017F7LE35
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Radio Receiver)

      Disconnect the radio receiver connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      E2-7 (SW1) - E2-6 (SWG) No switch pushed 95 to 105 kΩ
      E2-7 (SW1) - E2-6 (SWG) Seek+ switch pushed Below 2.5 Ω
      E2-7 (SW1) - E2-6 (SWG) Seek- switch pushed 312 to 345 Ω
      E2-7 (SW1) - E2-6 (SWG) Volume+ switch pushed 950 to 1050 Ω
      E2-7 (SW1) - E2-6 (SWG) Volume- switch pushed 2954 to 3265 Ω
      E2-8 (SW2) - E2-6 (SWG) No switch pushed 95 to 105 kΩ
      E2-8 (SW2) - E2-6 (SWG) MODE switch pushed Below 2.5 Ω
      E2-8 (SW2) - E2-6 (SWG)*1 Voice switch pushed 2954 to 3265 Ω
      E2-8 (SW2) - E2-6 (SWG)*1 On hook switch pushed 312 to 345 Ω
      E2-8 (SW2) - E2-6 (SWG)*1 Off hook switch pushed 950 to 1050 Ω

      • *1: w/ Telephone Microphone Assembly


    NG

    INSPECT STEERING PAD SWITCH ASSEMBLY Click here

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

  2. INSPECT STEERING PAD SWITCH ASSEMBLY


    1. Disconnect the steering pad switch assembly connector.

    2. Measure the resistance according to the value(s) in the table below.

      A017C5BE22
      Standard Resistance
      Tester Connection Condition Specified Condition
      z2-10 (AU1) - z2-8 (EAU) No switch pushed 95 to 105 kΩ
      z2-10 (AU1) - z2-8 (EAU) Seek+ switch pushed Below 2.5 Ω
      z2-10 (AU1) - z2-8 (EAU) Seek- switch pushed 312 to 345 Ω
      z2-10 (AU1) - z2-8 (EAU) Volume+ switch pushed 950 to 1050 Ω
      z2-10 (AU1) - z2-8 (EAU) Volume- switch pushed 2954 to 3265 Ω
      z2-9 (AU2) - z2-8 (EAU) No switch pushed 95 to 105 kΩ
      z2-9 (AU2) - z2-8 (EAU) MODE switch pushed Below 2.5 Ω
      z2-9 (AU2) - z2-8 (EAU)*1 Voice switch pushed 2954 to 3265 Ω
      z2-9 (AU2) - z2-8 (EAU)*1 On hook switch pushed 312 to 345 Ω
      z2-9 (AU2) - z2-8 (EAU)*1 Off hook switch pushed 950 to 1050 Ω

      • *1: w/ Telephone Microphone Assembly

      Text in Illustration
      *A w/ Telephone Microphone Assembly *a

      Component without harness connected

      (Steering Pad Switch Assembly)
      *b Volume+ *c Volume-
      *d Seek- *e MODE
      *f Seek+ *g On hook
      *h Off hook *i Voice

    NG

    REPLACE STEERING PAD SWITCH ASSEMBLY Click here

    OK

  3. INSPECT SPIRAL CABLE


    1. A017C6PE38
      Text in Illustration
      *a

      Component without harness connected

      (Spiral Cable)
      *b Steering Pad Switch Assembly Side
      *c Vehicle Side

      Disconnect the steering pad switch assembly and spiral cable connectors.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      z2-8 (EAU) - D53-4 (EAU) Center Below 1 Ω
      2.5 rotations to the left
      2.5 rotations to the right
      z2-10 (AU1) - D53-6 (AU1) Center Below 1 Ω
      2.5 rotations to the left
      2.5 rotations to the right
      z2-9 (AU2) - D53-5 (AU2) Center Below 1 Ω
      2.5 rotations to the left
      2.5 rotations to the right

      Note

      The spiral cable is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable may prevent the airbag from deploying. Be sure to read the pages shown in the brackets.

      Tech Tips



    NG

    REPLACE SPIRAL CABLE Click here

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE - RADIO RECEIVER)